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fs: fix ReadStream / WriteStream double close bug

* Calling fs.ReadStream.destroy() or fs.WriteStream.destroy() twice would close
  the file descriptor twice. That's bad because the file descriptor may have
  been repurposed in the mean time.

* A bad value check in fs.ReadStream.prototype.destroy() would prevent a stream
  created with fs.createReadStream({fd:0}) from getting closed.
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bnoordhuis committed May 2, 2012
1 parent acf1950 commit 47d6a946562b7825579211b0d617aee32bdf6f74
Showing with 71 additions and 6 deletions.
  1. +10 −6 lib/fs.js
  2. +61 −0 test/simple/test-fs-stream-double-close.js
@@ -1167,6 +1167,8 @@ ReadStream.prototype._emitData = function(d) {

ReadStream.prototype.destroy = function(cb) {
var self = this;

if (!this.readable) return;
this.readable = false;

function close() {
@@ -1182,10 +1184,10 @@ ReadStream.prototype.destroy = function(cb) {
});
}

if (this.fd) {
close();
} else {
if (this.fd === null) {
this.addListener('open', close);
} else {
close();
}
};

@@ -1367,6 +1369,8 @@ WriteStream.prototype.end = function(data, encoding, cb) {

WriteStream.prototype.destroy = function(cb) {
var self = this;

if (!this.writable) return;
this.writable = false;

function close() {
@@ -1382,10 +1386,10 @@ WriteStream.prototype.destroy = function(cb) {
});
}

if (this.fd) {
close();
} else {
if (this.fd === null) {
this.addListener('open', close);
} else {
close();
}
};

@@ -0,0 +1,61 @@
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

var common = require('../common');
var assert = require('assert');
var fs = require('fs');

test1(fs.createReadStream(__filename));
test2(fs.createReadStream(__filename));
test3(fs.createReadStream(__filename));

test1(fs.createWriteStream(common.tmpDir + '/dummy1'));
test2(fs.createWriteStream(common.tmpDir + '/dummy2'));
test3(fs.createWriteStream(common.tmpDir + '/dummy3'));

function test1(stream) {
stream.destroy();
stream.destroy();
}

function test2(stream) {
stream.destroy();
stream.on('open', function(fd) {
stream.destroy();
open_cb_called++;
});
process.on('exit', function() {
assert.equal(open_cb_called, 1);
});
var open_cb_called = 0;
}

function test3(stream) {
stream.on('open', function(fd) {
stream.destroy();
stream.destroy();
open_cb_called++;
});
process.on('exit', function() {
assert.equal(open_cb_called, 1);
});
var open_cb_called = 0;
}

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